Questions: In a sarcomere, the thick filaments attach to the line, found in the middle of the H band.

In a sarcomere, the thick filaments attach to the line, found in the middle of the H band.
Transcript text: Fill in the Blank Question In a sarcomere, the thick filaments attach to the $\square$ line, found in the middle of the H band.
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Solution

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The answer is: M line

Explanation:

  • In a sarcomere, which is the basic contractile unit of muscle fiber, the thick filaments are primarily composed of the protein myosin.
  • These thick filaments are anchored at the M line, which is located in the center of the H band.
  • The M line serves as the attachment point for the thick filaments, helping to maintain their alignment during muscle contraction and relaxation.
  • The H band is the region within the A band where only thick filaments are present, and the M line is situated in the middle of this band.
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